Triangle crossword project

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Across
  1. 3. a line segment coming from one vertex to the midpoint of the opposite side
  2. 6. an angle that is exactly equal to 90 degrees
  3. 9. an address, which helps to locate a point in space
  4. 10. the segment formed by connecting the midpoints of any 2 sides of a triangle
  5. 11. divides an angle into 2 equal parts
Down
  1. 1. a group of three vertices that are connected to each other, but do not contain any points within them
  2. 2. a point that divides the line segment into two equal halves
  3. 4. the space or length of the starting and stopping points of a particular line segment
  4. 5. three angles A, B, C and three sides a, b, c, with a being opposite to A, b opposite to B, and c opposite to C
  5. 7. a line that passes through two very specific points on a triangle
  6. 8. if their intersection forms right angles